Pbass1

[quote name='BigRedX' timestamp='1365682151' post='2042762'] Because the figures are wrong. If you could get more power out than you put in you'll have solved the world's energy problems. [/quote] I get that, but quite strange for a company like yamaha to make a mistake like that, thats why I asked are they measuring in different ways or a different unrelated factor, I didnt think theyd gone nuclear or invented perpetual motion lol also these figures seem to tie in with Gazm experiences what Im saying is this figure some kind of a typical draw rather than the max quoted by db markbass and rcf are they being belt and braces and yamaha more real world?

[quote name='BigRedX' timestamp='1365680105' post='2042723'] What you get out compared with what you put in depends on how efficient the equipment is. Digital stuff is pretty good, normally the consumption is 10-25% more than the output. Valve amps by comparison are very inefficient. Back in the 70s the rule of thumb was that the power consumption of a valve amp was roughly twice it's output rating! [/quote] How are the yamahas showing such a low input of 100w when the output is 900w?

Hi, thanks for all the advice so far, though still a bit confused checked the back of the rcf sub and it says 1100w max as did the markbass head 600w max the db technologies monitors were 450 w max each this is the figure given next to the iec connector then went to look for power consumption of the dsr15 and online they are showing 100w power consumption each dxr 10 90w do different manufacturers measure in such different ways or is the 100w power consumption figure of the yamahas a more realistic figure to go by for a high output amp between 800 and a thousand rms, all are digital modern amps so suprised at the different ratings. and the kam par bars online figure is 50 w power consumtion cheers Paul

Hi, any help much appreciated, new to running a PA and not sure how much you can plug into one socket in terms of watts etc at the moment there is one rcf active sub 1000w will be 2 eventually and 2 yamaha dsr 115s rms around 800 900 watts each also 3 400 rms watt monitors 500 w markbass head 600 w yamaha dxr active speaker as keyboard amp will also be running 2 Led par bars and a couple of led fx lights seems like a lot of watts should you keep lights and amps separate? should you keep monitors and foh separate? is there a calculation or rule of thumb ? confused Cheers Paul

thanks everyone just daisy chained and turned up to 2 while someone was mowing the lawn next door, the conservatory shook for a (few seconds anyway) daren't play too hard especially when playing my low B

[quote name='icastle' post='1359813' date='Sep 2 2011, 01:17 PM']You can use one or two 8Ω cabs on the GP12 cab as it's quite happy running a 4Ω load. It's not a current production model, so information is scant, but the concensus seems to be that it'll provide 300W into 4Ω. Both of your speakers are perfectly safe on the GP12 regardless of whether you are running them singly or as a pair. HTH[/quote] Im guessing that its also ok to Daisy chain the 2 speakers to produce the same 4 ohm load ? rather than using both outputs from the amp cheers Paul

Thanks for the advice, feel happier now that i know Im not frying the amp, or damaging the speakers, I think the sound is fantastic, probably gonna be my first choice for loud stuff as it just sounds so tight and heavy and easy to get a sound i like with the EQ balance cheers Paul

Hi, Ive just bought a Trace SMX gp12 head rated at 280w rms 560 peak as a back up to my markbass head it has 2 8 ohm speaker outs does it deliver 280w into one speaker @ 8ohms or do I need to use 2 8 ohm speakers one in each input, as it doesnt mention anything like 280w @ 4 ohms speakers are markbass traveller 8 ohm rated 400w and ashdown klystron 8 ohm rated 575w am i safe using one speaker and if so am i getting the full power?? ps I did read the impedance thread but still confused cheers Paul